Radiator



Dec- 22 l931- c. H. JACKSON 1,837,442

RADIATOR I Filed Sept. 13, 1929 INVENToR.

BY wwfwcm @l/LL, ZUM fw@ A TTORNEY` Patented Dec. 22, 1931 UNITED STATES PATENT OFFICE CHARLES HERBERT JACKSON, MILWAUKEE COUNTY, WISCONSIN, ASSIGNOR TO BAYLEY BLOWER COMPANY, OF MILWAUKEE, WISCONSIN, A. CORPORATION OF WISCONSIN RADIATOR Application led September 13, 1929. Serial* No. 392,416.

This invention relates to improvements in radiators.

It is the primary object of the invention to take advantage -of the great heat 5 radiating power of a helically finned radiator tube without subjecting such tube to distortion such as tends either permanently to Warp the tube, or to free or loosen the helically disposed fins from the shallow peripheral grooves in which such fins are commonly disposed on the surfaces of the tubes employed.

More specifically stated, it is my purpose to provide a novel and improved radiator section in which the helically finned tubes are anchored only at one of their ends, the other end of each such tube being left free to expand and contract Without being subject to pressure or tension, but are enclosed to protect the'end of the fin.

In the drawings:

Figure 1 is a side elevation of a radiator section embodying this invention.

Figure 2 is a detail in section, showing a fragmentary portion of the chest end of the radiator.

Figure 3 is a further detail, showing a fragmentary section of the expansion end of the radiator.

Figure 4 is a further enlarged detail of the expansion end of one of the radiator tubes.

Like parts are identified by the same reference characters throughout the several views. t

I have illustrated at 5 a combination steam supply and return header which may be similar to that disclosed in Bassler, Patent No. 1,368,318. I have discovered that such a header is peculiarly advantageous in conjunction o with radiator tubes provided with helical fins and mounted in accordance with the disclosure of the present invention.

The steam supply compartment 6 of header 5 is supplied with steam through pipe 7, while the return compartment 8 of the header is connected With return pipe 9.

Assembled upon the header is arectangular frame l0 of which the header 5 comprises one end. The opposite end of the frame com- 50 prises a finishing plate 11 having large apertures, a bearing plate 12 and an end closure 13.

Extending from one end to the other of the frame 10 and preferably inclined as shown in Figure l, are the helically finned radiator tubes 15. The inner end 16 of each such tube is anchored in a plug 17 threaded in an opening in the Wall of the return compartment 8 of the chest. The opposite end of eac-h radiator tube 15 is closed as shown at 18 and is guided in an opening 19 in the bearing plate 12 for free expansion and contraction in response to changes of temperature.

The exterior periphery of each radiator tube 15 is provided with helical radiating fins 20. These fins are usually anchored on the tube by providing a tube with a helical' groove shown at 21 in Figure 4 into which the inner margin of the fin is received. The fin is anchored in its groove either by soldering it or by upsetting the metal of the tube upon the margin of the fin. In either case, excessive distortion of the radiator tube is apt to result in freeing the fin for some portion of its length, thereby permitting its successive coils to become displaced and: interl.

tering materially with the conduction of heat from the tube to the fin and the proper radiation of such heat to the atmosphere to which the fin is exposed.

The fin 2G extends from a point near the plug 17 of each tube to a point near to but spaced from the opening 19 in which the free end of the tube takes its bearing. The spacing is sufficient so that no reasonable expansion of the tube can bring its-fin into Contact with bearing plate 12. The finishing plate 11 performs no function other than to conceal i rigidly within tubes 15 to a point near their respective extremities.

Although the method of mounting radiator and steam supply pipes concentrically, in combination with a partition header, is broadly old, there are advantages peculiar to the use of such a mounting in conjunction with a finned radiator pipe such as is herein disclosed. The mounting aforesaid eliminates the buckling o i' the radiator pipes which is observed to occur Where the ends of the pipes are rigidly fixed between spaced head* ers. By permitting the free expansive and conti-active movement of the finned radiator pipes, I have thus eliminated at their source, the forces which tend to separate from such a pipe the helical radiating fin upon which the pipe depends for its eiicacy. The disposition of the pipes in the frame 10 with its several end plates ll, 12 and 13, is calculated to minimize the visible effect of the free movement of they ends of the pipe While protecting and enclosing the ends of the fins, this being the point at which the ns are most liable to become damaged.

I claim:

1. The combination with aheader, of a finned radiator pipe anchored rigidly to said header, closed at the end remote therefrom and provided with means spaced from the fins of said pipe for supporting its free end for expanding and contracting movement.

2. In a device of the character described, the combination with a header, of radiator pipes, each anchored at one end of the header and each closed at its opposite ends, fins helically disposed exteriorly upon said pipes and connected therewith, said fins being spaced from the closed ends of the pipes, and a support provided with apertures in which the unfinned closed extremities of said pipes have their respective bearings for expansive and contractive movement.

3. In a device of the character described, the combination with a header, of radiator pipes, each anchored at one end of the header and each closed at its opposite end, fins helically disposed exteriorly upon said pipes and connected therewith, said fins being spaced from the closed ends of the pipes, and a support provided with apertures in which the unlinned closed extremities of said pipes have their respective bearings for expansive and contractive movement, said support comprising apart of" a frame of which said header constitutes an opposing part.

4. In a device of the character described,

the combination with a header,- of helically finned radiator pipes projecting therefrom, the remote ends of said pipes being free to move axially and provided with bearing portions free of fins, an apertured support in which the bearing portions of said pipes are engaged and an associated plate having apertures sufficiently large to clear said fins While' enclosing the terminal portions thereof.

5. In a device of the character described, the combination with a header, of helically finned radiator pipes anchored therein and projecting therefrom, the remote ends of the pipes being free to move, closed against loss of steam, and provided With bearing portions free of fins, a frame for said pipes connected With said header and having a box like end portion spaced therefrom in to which the ends of the respective pipes project, said end portion having a bearing plate apertured to receive the bearing port-ions of said pipes, and a finishing plate having apertures s uiiciently large to clear the fins of said pipes, the fins having their terminal portions with in said finishing plate.

CHARLES HERBERT JACKSON.

Ill@- 

